how do i active my motorola droid

Hey everyone! It's my first time posting to these forums so please forgive me if I make any mistakes.
i not in us .
today i factory reset my phone after that When I started the phone again I was asked to re-activate it. I couldn't do it. I kept getting a message saying "We're sorry but we are unable to program your phone at this time. You may try again later or dial..." .
help me !